122331312011 has 4 divisors (see below), whose sum is σ = 122807309592. Its totient is φ = 121855314432.

The previous prime is 122331311951. The next prime is 122331312013. The reversal of 122331312011 is 110213133221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122331312011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122331312013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237998405 + ... + 237998918.

It is an arithmetic number, because the mean of its divisors is an integer number (30701827398).

Almost surely, 2^122331312011 is an apocalyptic number.

122331312011 is a deficient number, since it is larger than the sum of its proper divisors (475997581).

122331312011 is an equidigital number, since it uses as much as digits as its factorization.

122331312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475997580.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 122331312011 its reverse (110213133221), we get a palindrome (232544445232).

The spelling of 122331312011 in words is "one hundred twenty-two billion, three hundred thirty-one million, three hundred twelve thousand, eleven".